Water supply mechanism and automatic cleaning apparatus

ABSTRACT

A water supply mechanism and an automatic cleaning apparatus are provided. The water supply mechanism is applicable for a wet cleaning assembly of a cleaning device, comprising a water outlet device, wherein the water outlet device is connected to a cleaning liquid outlet of a water tank, and a cleaning liquid in the water tank flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure is a US national phase application under 35 U.S.C. § 371 of PCT application number PCT/CN2021/074944, which claims priority to Chinese applications No. 202011068466.7, 202011033471.4, 202011035328.9, and 202011035341.4 filed on Sep. 27, 2020, which are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to a cleaning apparatus, and specifically, to a water supply mechanism and an automatic cleaning apparatus.

BACKGROUND

Currently, cleaning robots mainly include a sweeping robot and a mopping robot. Functions of the sweeping robot and the mopping robot are relatively single, resulting a greatly reduced mopping effect and efficiency.

SUMMARY

The present disclosure provides a water supply mechanism applicable for a wet cleaning assembly of a cleaning device, including a water outlet device, wherein the water outlet device is connected to a cleaning liquid outlet of a water tank, and a cleaning liquid in the water tank flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.

The present disclosure further provides an automatic cleaning apparatus, including a mobile platform and a wet cleaning assembly, wherein the wet cleaning assembly includes a water supply mechanism; wherein the water supply mechanism includes a water outlet device connected to a cleaning liquid outlet of a water tank, and a cleaning liquid flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.

BRIEF DESCRIPTION OF DRAWINGS

The accompanying drawings described herein are intended to provide a further understanding of the present disclosure and constitute a part of this application, and the illustrative embodiments of the present disclosure and the descriptions thereof are intended to explain the present disclosure and do not constitute improper limitations on the present disclosure. In the accompanying drawings:

FIG. 1 illustrates a perspective view of an automatic cleaning apparatus according to an embodiment of the present disclosure;

FIG. 2 illustrates a schematic diagram of a bottom structure of an automatic cleaning apparatus according to an embodiment of the present disclosure;

FIG. 3 illustrates a perspective view of a wet cleaning assembly according to an embodiment of the present disclosure;

FIG. 4 illustrates a bottom view of a wet cleaning assembly according to an embodiment of the present disclosure;

FIG. 5 illustrates a side view of a wet cleaning assembly according to an embodiment of the present disclosure;

FIG. 6 illustrates a perspective view of a water sink according to an embodiment of the present disclosure;

FIG. 7 illustrates a perspective view of a dust box according to an embodiment of the present disclosure;

FIG. 8 i illustrates s a perspective view of a fan according to an embodiment of the present disclosure;

FIG. 9 illustrates a schematic diagram of an open state of a dust box according to an embodiment of the present disclosure;

FIG. 10 illustrates a schematic diagram of a combined state of a dust box and a fan according to an embodiment of the present disclosure;

FIG. 11 illustrates a schematic diagram of a lifting mechanism according to an embodiment of the present disclosure;

FIG. 12 illustrates a side view of a lifting mechanism according to an embodiment of the present disclosure;

FIG. 13 illustrates a perspective view of a drive wheel assembly on a side according to an embodiment of the present disclosure;

FIG. 14 illustrates a front view of a drive wheel assembly on a side according to an embodiment of the present disclosure;

FIG. 15 illustrates a partial cross-sectional view of a water level detection device in a water tank according to an embodiment of the present disclosure;

FIG. 16 illustrates a schematic overall assembly diagram of a wet cleaning assembly (with a water tank) according to an embodiment of the present disclosure;

FIG. 17 illustrates a bottom view of a wet cleaning assembly (without a cleaning head) according to an embodiment of the present disclosure;

FIG. 18 illustrates a schematic structural diagram of a cleaning head according to an embodiment of the present disclosure;

FIG. 19 illustrates a schematic structural diagram of a water absorbing roller according to an embodiment of the present disclosure; and

FIG. 20 illustrates a schematic structural diagram of a recycle rod according to an embodiment of the present disclosure.

DESCRIPTION OF REFERENCE SIGNS

Mobile platform 100, front part 110, rear part 111, sensing system 120, position determining device 121, buffer 122, cliff sensor 123, control system 130, drive system 140, drive wheel assembly 141, steering assembly 142, elastic element 143, drive motor 146, cleaning system 150, dry cleaning assembly 151, side brush 152, filter 153, dust suction port 154, air outlet 155, fan 156, dust box 157, energy system 160, human-computer interaction system 170, lighting device 171, wet cleaning assembly 200, cleaning head 210, elastic support structure 211, camshaft 212, slide rail 213, water supply mechanism 220, clean water pump 221, clean water pump pipe 222, water outlet device 223, water return mechanism 230, water absorbing roller 231, recycle rod 232, sewage pump 233, sewage pump pipe 234, elastic water absorbing material 235, wiper 236, recycle groove 237, recycle blade 238, recycle bin 239, water tank 240, clean water tank 241, dirty water tank 242, water level detection device 243, air outlet 244, lifting mechanism 250, power mechanism 260, power transmission device 261, motor 262, lifting platform base 270, first connection end 271, second connection end 272, auxiliary wheel 273, and press plate 280.

DESCRIPTION OF EMBODIMENTS

To make one of ordinary skill in the art better understand the solutions in the present disclosure, the following clearly and comprehensively describes the technical solutions according to the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Clearly, the described embodiments are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments of the present disclosure without any creative efforts shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that direction or position relationships indicated by the terms such as “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, and “outer” are direction or position relationships illustrated based on the accompanying drawings, and are intended merely for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that an indicated device or element must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms “first”, “second”, and “third” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the term “install”, “connect”, or “connection” should be understood in a broad sense, for example, may be a fixed connection, or may be a detachable connection or an integrated connection; or may be a mechanical connection, or may be an electrical connection; or may be a direct connection, or may be an indirect connection via an intermediate medium, or may be an intercommunication between two components. For one of ordinary skill in the art, specific meanings of the terms in the present disclosure can be understood based on specific cases.

The present disclosure provides a water supply mechanism, which can spray liquid a relatively large range uniformly, thereby achieve a good ground cleaning effect. The present disclosure further provides an automatic cleaning apparatus, which changes, by adopting a novel design of a mopping structure, a case that a typical cleaning robot can perform only dry cleaning or wet cleaning, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect; or which can guarantee a good sewage recycle effect, sewage is recycled thoroughly, and the sewage is separated from sludge when the sewage is recycled, thereby facilitating cleaning of a recycle mechanism and preventing a sewage recycle pipeline from being blocked.

As illustrated in FIG. 2 to FIG. 4 , FIG. 6 and FIG. 16 , a water supply mechanism 220 includes a water outlet device 223. The water outlet device 223 may be directly or indirectly connected to a cleaning liquid outlet 2401 of a water tank 240, namely, a liquid outlet of a clean water tank 241. A cleaning liquid may flow to the water outlet device 223 through the cleaning liquid outlet 2401 of the water tank 240, and may be uniformly applied on a surface to be cleaned through the water outlet device 223. A connection port 2232 may be provided on the water outlet device 223, and the water outlet device 223 is connected to the cleaning liquid outlet 2401 of the water tank 240 through the connection port 2232. A distributor 2231 is provided on the water outlet device 223. The distributor 2231 may be a continuous opening, or may be a combination of several small disconnected openings. A plurality of nozzles may be provided on the distributor. The cleaning liquid flows to the distributor 2231 through the cleaning liquid outlet 2401 of the water tank 240 and the connection port 2232 of the water outlet device 223, and is uniformly applied onto a surface to be cleaned through the distributor 2231.

The water supply mechanism 220 may further include a clean water pump 221, and clean water pump 221 may be directly communicated with the cleaning liquid outlet 2401 of the water tank 240. Optionally, the water supply mechanism 220 may further include a clean water pump pipe 222, and the clean water pump 221 may be communicated with the cleaning liquid outlet 2401 of the water tank 240 through the clean water pump pipe 222.

The clean water pump 221 may be connected to the connection port 2232 of the water outlet device 223, and may be configured to pump the cleaning liquid from the water tank 240 to the water outlet device 223. The clean water pump may be a gear pump, a vane pump, a plunger pump, etc.

The water supply mechanism 220 pumps the cleaning liquid from the clean water tank 241 through the clean water pump 221 and the clean water pump pipe 222, and transports the cleaning liquid to the water outlet device 223. The distributor 2231 may include at least one of a nozzle, a dripping hole, a soaked cloth, etc., and uniformly distribute water in front of a cleaning head 210 to wet the cleaning head 210 and the surface to be cleaned. Stains on the wet surface to be cleaned can be cleaned more easily.

The water supply mechanism 220 may be directly connected to a mobile platform 100, or may be indirectly connected to a mobile platform 100 through a lifting mechanism 250.

An automatic cleaning apparatus according to this embodiment includes all structures of the above water supply mechanism 220 and/or a water return mechanism 230.

FIG. 1 and FIG. 2 illustrate schematic structural diagrams of an automatic cleaning apparatus according to an exemplary embodiment. As illustrated in FIG. 1 and FIG. 2 , the automatic cleaning apparatus may be a vacuum suction robot, a mopping/brushing robot, or a window climbing robot, etc. The automatic cleaning apparatus may include a mobile platform 100, a sensing system 120, a control system 130, a drive system 140, a cleaning system 150, an energy system 160, and a human-computer interaction system 170.

The mobile platform 100 may be configured to automatically move in a target direction on a surface to be cleaned. In some embodiments, the automatic cleaning apparatus may be a mopping robot. In this case, the automatic cleaning apparatus operates on the ground, and the ground is the surface to be cleaned. Alternatively, the automatic cleaning apparatus may be a window cleaning robot. In this case, the automatic cleaning apparatus operates on an outer surface of glass of a building, and the outer surface of the glass is the surface to be cleaned. Alternatively, the automatic cleaning apparatus may be a pipe cleaning robot. In this case, the automatic cleaning apparatus operates on an inner surface of a pipe, and the inner surface of the pipe is the surface to be cleaned. The following descriptions in this application are provided by taking a mopping robot as an example merely for illustrative purposes.

In some embodiments, the mobile platform 100 may be an autonomous mobile platform, or may be a non-autonomous mobile platform. The autonomous mobile platform refers to a mobile platform 100 that can automatically and adaptively make an operation decision based on unexpected environmental input. The non-autonomous mobile platform refers to a mobile platform that cannot adaptively make an operation decision based on unexpected environmental input, but can execute a given program or operate based on certain logic. Correspondingly, when the mobile platform 100 is an autonomous mobile platform, the target direction may be autonomously determined by the automatic cleaning apparatus; or when the mobile platform 100 is a non-autonomous mobile platform, the target direction may be set systematically or manually. When the mobile platform 100 is an autonomous mobile platform, the mobile platform 100 includes a front part 111 and a rear part 110.

The sensing system 120 includes a position determining device 121 located on the mobile platform 100, a buffer 122 located at the front part 111 of the mobile platform 100, and sensing devices located at a bottom of the mobile platform, such as a cliff sensor 123, an ultrasonic sensor (not shown in the drawings), an infrared sensor (not shown in the drawings), a magnetometer (not shown in the drawings), an accelerometer (not shown in the drawings), a gyroscope (not shown in the figure), and an odometer (not shown in the drawings); and provides various types of position information and motion state information of the machine for the control system 130.

As illustrated in FIG. 2 , cliff sensors 123 are disposed on the bottom of the mobile platform 100 and in front of and behind a drive wheel assembly 141, respectively. The cliff sensors are configured to prevent the automatic cleaning apparatus from falling when the automatic cleaning apparatus reverses, thereby preventing the automatic cleaning apparatus from being damaged. The term “front” refers to the same side relative to a travelling direction of the automatic cleaning apparatus, and the term “behind” refers to an opposite side relative to the travelling direction of the automatic cleaning apparatus.

The position determining device 121 includes, but is not limited to, a camera and a laser distance sensor (LDS).

The components of the sensing system 120 may operate independently, or may operate jointly to implement a target function more accurately. The surface to be cleaned is identified by the cliff sensor 123 and the ultrasonic sensor, to determine physical characteristics of the surface to be cleaned, including a surface material, a cleaning degree, etc., and the physical characteristics of the surface to be cleaned may be determined more accurately by the cliff sensor and the ultrasonic sensor along with the camera, the laser distance sensor, etc.

For example, the ultrasonic sensor may be configured to determine whether the surface to be cleaned is a carpet. If the ultrasonic sensor determines that the surface to be cleaned is a carpet material, the control system 130 controls the automatic cleaning apparatus to perform cleaning in a carpet mode.

The buffer 122 is disposed on the front part 111 of the mobile platform 100. In a cleaning process, when the drive wheel assembly 141 propels the automatic cleaning apparatus to travel on the ground, the buffer 122 detects one or more events (or objects) in a travelling path of the automatic cleaning apparatus through the sensing system, such as the infrared sensor. The automatic cleaning apparatus may control, based on the events (or the objects) detected by the buffer 122, such as an obstacle or a wall, the drive wheel assembly 141 to enable the automatic cleaning apparatus to respond to the events (or objects), for example, staying away from the obstacle.

The control system 130 is disposed on a circuit mainboard of the mobile platform 100 and includes a computing processor, such as a central processing unit or an application processor, which communicates with a non-transitory memory, such as a hard disk, a flash memory, or a random access memory. The computing processor is configured to receive, from the sensing system 120, environmental information sensed by the plurality of sensors; draw an instant map of an environment in which the automatic cleaning apparatus is located based on obstacle information fed back by the laser distance sensor, etc. through a positioning algorithm, such as Simultaneous Localization And Mapping (SLAM); and autonomously determine a travelling path based on the environmental information and the environmental map; and then control, based on the autonomously determined travelling path, the drive system 140 to perform operations, for example, moving forward, reversing, and/or turning. Further, the control system 130 may determine, based on the environmental information and the environmental map, whether to start a cleaning module 300 to perform a cleaning operation.

For example, the control system 130 may comprehensively determine a current working state of a sweeper with reference to distance information and speed information fed back by the buffer 122 and the sensing devices such as the cliff sensor 123, the ultrasonic sensor, the infrared sensor, the magnetometer, the accelerometer, the gyroscope, and the odometer. For example, the current working state of the sweeper may be crossing a threshold, climbing a carpet, being located at a cliff, being stuck above or below, having a full dust box, or being picked up. The control system 130 may further provide next action polices based on different conditions, so that the work of the automatic cleaning apparatus more meets with requirements of the owner and the owner has good user experience. Further, the control system can plan the most efficient and reasonable cleaning path and cleaning mode based on information about the instant map drawn through SLAM, thereby greatly improving the cleaning efficiency of the automatic cleaning apparatus.

The drive system 140 may operate the automatic cleaning apparatus to travel across the ground based on a drive command including distance and angle information, such as x, y, and 0 components. FIG. 13 and FIG. 14 illustrate a perspective view and a front view of a drive wheel assembly 141 on a side according to an embodiment of the present disclosure. As illustrated in the drawings, the drive system 140 includes a drive wheel assembly 141. The drive wheel assembly 141 can control a left wheel and a right wheel simultaneously. For example, to control movement of the automatic cleaning apparatus more accurately, the drive wheel assembly 141 includes both a left drive wheel assembly and a right drive wheel assembly. The left and right drive wheel assemblies are disposed opposite to each other along a transverse axis defined by the mobile platform 100. A drive motor 146 is disposed in each of the drive wheel assemblies. The drive motor 146 is located outside the drive wheel assembly 141, and the axis of the drive motor 146 passes through the drive wheel assembly. The drive wheel assembly 141 may be further connected to a circuit configured to measure a drive current and the odometer.

To enable the automatic cleaning apparatus to move on the ground relatively stably or have a relatively strong movement capability, the automatic cleaning apparatus may include one or more steering assembly 142. The steering assembly 142 may be a driven wheel or a drive wheel, and a structural form of the steering assembly 142 includes but is not limited to a universal wheel. The steering assembly 142 may be located in front of the drive wheel assembly 141.

The drive motor 146 supplies power the drive wheel assembly 141 and/or the steering assembly 142 to rotate.

The drive wheel assembly 141 is detachably connected to the mobile platform 100 to facilitate disassembly/assembly and maintenance. The drive wheel assembly may have a bias drop suspension system. The bias drop suspension system is fastened to the mobile platform 100 of the automatic cleaning apparatus in a movable manner, for example, attached to the mobile platform 100 of the automatic cleaning apparatus in a rotatable manner, and maintains contact and traction with the ground with a grounding force through an elastic element 143, such as a tension spring or a compression spring. In addition, the cleaning system 150 of the automatic cleaning apparatus is also in contact with the surface to be cleaned with a certain pressure.

The energy system 160 includes a rechargeable battery, such as a nickel-metal hydride battery or a lithium battery. The rechargeable battery may be connected to a charging control circuit, a battery pack charging temperature detection circuit, and a battery undervoltage monitoring circuit. Then, the charging control circuit, the battery pack charging temperature detection circuit, and the battery undervoltage monitoring circuit are connected to a single-chip microcomputer control circuit. The machine body is connected to a charging station for charging through charging electrodes disposed on a side of the machine body or under the machine body. If the exposed charging electrodes are covered with dust, due to a charge accumulation effect during charging, the plastic machine body around the electrodes may melt and deform, and even the electrodes may deform. As a result, proper charging cannot be continued.

The human-computer interaction system 170 includes buttons on a panel of the machine body for the user to select functions. The human-computer interaction system 170 may further include a display screen and/or an indicator and/or a loudspeaker, wherein the display screen, the indicator, and the loudspeaker display a current state of the machine or function options to the user. And the human-computer interaction system 170 may further include a mobile phone client program. Regarding a cleaning apparatus of a path navigation type, a map of an environment in which the device is located and the position of the apparatus may be displayed to the user on a mobile phone client, and richer and more humanized function items may be provided for the user.

The human-computer interaction system 170 further includes a lighting device 171 disposed on the machine body.

The lighting device 171 is disposed behind a water tank. When the automatic cleaning apparatus works, the lighting device 171 is lit to illuminate the cleaned ground, so that the user can check whether the ground is clean.

The lighting device 171 may also be used as an alarm light. When water in a cleaning liquid tank in the water tank is insufficient or water in a recycle liquid tank is excessive, the lighting device 171 flashes or changes its color to prompt an alarm. When intensity of ambient light is lower than a preset value, the lighting device 171 automatically turns on. When the intensity of ambient light intensity is higher than the preset value, the lighting device 171 automatically turns off

The lighting device 171 is an LED light. The lighting device 171 may be multiple indicators along an edge of the mobile platform, or may be an indicator belt along the edge of the mobile platform.

To describe behavior of the automatic cleaning apparatus more clearly, directions are defined as follows: The automatic cleaning apparatus may travel on the ground in various combinations of movements relative to the following three mutually perpendicular axes defined by the mobile platform 100: a transverse axis x, a longitudinal axis y, and a central vertical axis z. A forward drive direction along the longitudinal axis y is denoted as “forward”, and a backward drive direction along the longitudinal axis y is denoted as “backward”. The transverse axis x substantially extends between the right and left wheels of the automatic cleaning apparatus along an axis defined by the center point of the drive wheel assembly 141. The automatic cleaning apparatus can rotate around the x axis. When the front part of the automatic cleaning apparatus is inclined upward and the rear part of the automatic cleaning apparatus is inclined downward, the automatic cleaning apparatus is “pitching up”. When the front part of the automatic cleaning apparatus is inclined downward, and the rear part of the automatic cleaning apparatus is inclined upward, the automatic cleaning apparatus is “pitching down”. In addition, the automatic cleaning apparatus can rotate around the z axis. In a traveling direction of the automatic cleaning apparatus, when the automatic cleaning apparatus is inclined to the right of the y axis, the automatic cleaning apparatus is “turning right”. When the automatic cleaning apparatus is inclined to the left of the y axis, the automatic cleaning apparatus is “turning left”.

The cleaning system 150 may include a dry cleaning assembly 151 and/or a wet cleaning assembly 200.

FIG. 3 to FIG. 5 illustrate the wet cleaning assembly 200 of the cleaning system 150. The wet cleaning assembly includes at least one cleaning head 210, a water supply mechanism 220, a water return mechanism 230, a water tank 240, a lifting mechanism 250, and a power mechanism 260.

The cleaning head 210 performs a reciprocating motion along the surface to be cleaned, and a cleaning cloth or a cleaning plate is disposed on a contact surface of the cleaning head 210 with the surface to be cleaned, so that stains on the surface to be cleaned is removed by high-frequency friction, generated due to the reciprocating motion, between the cleaning head and the surface to be cleaned.

In this embodiment, as illustrated in FIG. 17 and FIG. 18 , the cleaning head 210 may be made of a material with elasticity. A hole is respectively disposed at both ends of the cleaning head 210 and respectively sleeved on a camshaft 212 and a slide rail 213, to implement the reciprocating motion. The cleaning head 210 is supported by an elastic support structure 211 on the wet cleaning assembly 200. The elastic support structure 211 may be a spring plate, a spring, or the like. When the cleaning head 210 works, the cleaning head 210 is kept in contact with the surface to be cleaned. A distance between the surface to be cleaned and the wet cleaning assembly 200 is not constant during automatic and/or autonomous cruising of the automatic cleaning apparatus. The elasticity of the cleaning head 210 and the elastic support structure 211 enable the distance between the cleaning head 210 and the wet cleaning assembly 200 to be adjusted passively according to the surface to be cleaned.

As illustrated in FIG. 6 , the water tank 240 includes a clean water tank 241 and a dirty water tank 242. The clean water tank 241 is configured to store a cleaning liquid. The dirty water tank 242 is configured to store a recycled liquid. The clean water tank 241 and the dirty water tank 242 are independent from each other and each is provided with an opening for liquid cleaning or injection.

The water tank 240 includes a clean water tank 241 and a dirty water tank 242. The clean water tank 241 is configured to store a cleaning liquid. The dirty water tank 242 is configured to store a recycled liquid. The clean water tank 241 and the dirty water tank 242 are independent from each other and each is provided with an opening for cleaning or liquid injection. A filter is disposed at an entrance of the clean water tank 241.

The clean water tank 241 is a special-shaped structure as a whole and has at least one surface abutting against a bottom surface of the water tank 240. For example, the clean water tank 241 includes a vertical part and a horizontal part and has an L-shaped structure as a whole. The dirty water tank 242 is located on an upper side of the horizontal part of the clean water tank 241.

The clean water tank 241 is a special-shaped structure as a whole and has at least one surface abutting against the bottom surface of the water tank 240. For example, the clean water tank 241 includes a vertical water storage cavity and a horizontal water storage cavity, and the clean water tank 241 is an L-shaped structure as a whole. The dirty water tank 242 is located on an upper side of the horizontal water storage cavity of the clean water tank 241 and is disposed parallel to the vertical water storage cavity.

A volume of the clean water tank 241 is greater than a volume of the dirty water tank 242.

As a water level of the clean water tank 241 drops, a water level of the dirty water tank 242 rises, so that a gravity center of the water tank 240 can still be kept on a center line of the water tank.

A liquid inlet of the clean water tank 241 and a liquid outlet of the dirty water tank 242 are disposed on a top of the water tank 240, and the liquid inlet of the clean water tank 241 and the liquid outlet of the dirty water tank 242 are designed symmetrically.

An air outlet 244 is disposed in the middle of the water tank 240 in a hidden manner. The air outlet 244 is in communication with an internal space of the clean water tank 241, and the air outlet 244 is in communication with an internal space of the dirty water tank 242.

A filter is disposed at the entrance of the clean water tank 241 to filter the cleaning liquid entering the clean water tank 241, to prevent impurities from entering and blocking a cleaning pipe.

The liquid inlet of the clean water tank 241 and the liquid outlet of the dirty water tank 242 are symmetrically designed, and the air outlet 244 is disposed in the middle of the water tank 240 in a hidden manner.

As illustrated in FIG. 15 , water level detection device 243 are further disposed in the clean water tank 241 and the dirty water tank 242. The water level detection device can detect water level in the clean water tank 241 and water level in the dirty water tank 242. When the water level in the clean water tank 241 is low or the water level in the dirty water tank 242 is high, the user is reminded of manual intervention through the display screen and/or the indicator and/or the loudspeaker and/or the mobile phone client program, etc. of the human-computer interaction system 170.

The water level detection device 243 adopted in this embodiment is a hollow float with a magnet disposed inside, and a Hall effect sensor is disposed at a bottom of the water tank and opposite to the magnet. When the water level in the water tank is high, the water level detection device is driven by the float to rise, and a distance between the magnet and the Hall effect sensor becomes greater. When the water level in the water tank is low, the water level detection device is driven by the float to drop, and the distance between the magnet and the Hall effect sensor becomes smaller. The distance between the magnet and the Hall effect sensor is sensed by using the Hall effect sensor, so as to determine the water level.

The water level detection device 243 may adopt other solutions that can detect the water level, such as a resistive type and a capacitive type.

The water level detection devices in the clean water tank 241 and the dirty water tank 242 may have the same structure or different structures.

The water supply mechanism 220 includes a water outlet device 223. The water outlet device 223 may be directly or indirectly connected to a cleaning liquid outlet 2401 of the water tank 240, namely, a liquid outlet of the clean water tank 241. The cleaning liquid may flow to the water outlet device 223 through the cleaning liquid outlet 2401 of the water tank 240, and may be uniformly applied onto the surface to be cleaned through the water outlet device 223. A connection port 2232 may be disposed on the water outlet device 223, and the water outlet device 223 is connected to the cleaning liquid outlet 2401 of the water tank 240 through the connection port 2232. A distribution port is disposed on the water outlet device 223. The distribution port may be a continuous opening, or may include a combination of several small disconnected openings. A plurality of nozzles may be disposed at the distribution port. The cleaning liquid flows to the distribution port through the cleaning liquid outlet 2401 of the water tank 240 and the connection port 2232 of the water outlet device 223, and is uniformly applied onto the surface to be cleaned through the distribution port.

The water supply mechanism 220 may further include a clean water pump 221 and/or a clean water pump pipe 222. The clean water pump 221 may be directly communicated with the cleaning liquid outlet 2401 of the water tank 240, or may be communicated with the cleaning liquid outlet 2401 of the water tank 240 through the clean water pump pipe 222.

The clean water pump 221 may be connected to the connection port 2232 of the water outlet device 223, and may be configured to pump the cleaning liquid from the water tank 240 to the water outlet device 223. The clean water pump may be a gear pump, a vane pump, a plunger pump, etc.

The water supply mechanism 220 pumps the cleaning liquid from the clean water tank 241 through the clean water pump 221 and the clean water pump pipe 222, and transports the cleaning liquid to the water outlet device 223. The water outlet device 223 may include a nozzle, a dripping hole, a soaked cloth, etc., and uniformly distribute water in front of the cleaning head 210 to wet the cleaning head 210 and the surface to be cleaned. Stains on the wet surface to be cleaned can be cleaned relatively easily.

The water supply mechanism 220 may be connected to the mobile platform 100 directly, or may be connected to the mobile platform 100 indirectly through a lifting mechanism 250.

In the wet cleaning assembly 200, the power/flow rate of the clean water pump 221 and a sewage pump 233 can be adjusted. A water absorbing amount of the sewage pump 233 is greater than a water discharging amount of the clean water pump 221, thereby guaranteeing that 100% of the dirty cleaning liquid can be recycled, and the efficiency can be ensured even when a recycle pipeline is partially blocked.

Further, the cleaning head 210, a water absorbing roller 231, and a recycle rod 232 are all installed on the wet cleaning assembly 200 through a press plate 280. The press plate 280 may be disposed at both ends or at only one end of the cleaning head 210, the water absorbing roller 231, and the recycle rod 232. Through the press plate 280, the user can easily detach, clean, and replace the cleaning head 210, the water absorbing roller 231, and the recycle rod 232, which also facilitates later maintenance and repair.

Each of powers of the cleaning head 210, the clean water pump 221, and the sewage pump 233 can be adjusted automatically and dynamically based on a working environment of the automatic cleaning apparatus. Generally, the user can control the cleaning strength of the cleaning head 210 and water amounts of the pumps through the human-computer interaction system 170.

As illustrated in FIG. 1 to FIG. 5 , FIG. 19 , and FIG. 20 , the water return mechanism 230 includes a water absorbing roller 231 and a recycle rod 232.

The water absorbing roller 231 may be connected to the mobile platform 100 through a shaft, or may be connected to the mobile platform 100 indirectly through the lifting mechanism 250 in a manner of rotating around a shaft. A drive device of the water absorbing roller, namely, the power mechanism 260 may be directly connected to the water absorbing roller 231, or may be connected to the water absorbing roller 231 indirectly through a power transmission device 261. The power mechanism 260 may drive the water absorbing roller 231 to rotate relative to the mobile platform 100. When the water return mechanism 230 works, the water absorbing roller 231 may come into contact with the surface to be cleaned. The water absorbing roller 231 rotates synchronously during the cleaning head 210 cleans, and absorbs the dirty cleaning liquid obtained after cleaning of the cleaning head 210 through an elastic water absorbing material 235 on the water absorbing roller 231.

As illustrated in FIG. 19 , an outer surface of the water absorbing roller 231 is coated with a layer of elastic water absorbing material 235. The elastic water absorbing material 235 can absorb the dirty cleaning liquid remaining on the surface to be cleaned. The elastic water absorbing material 235 may be a water absorbing fabric, a water absorbing sponge, etc.

The power mechanism 260 can drive the water absorbing roller 231 to move against the target direction, and can further drive the water absorbing roller 231 to move along the target direction. The movement against the target direction refers to that a contact part of the water absorbing roller 231 with the surface to be cleaned has a linear velocity V pointing to the target direction. The target direction may be the front of the mobile platform 100. The movement along the target direction refers to that a contact part of the water absorbing roller 231 with the surface to be cleaned has a linear velocity V of pointing to a direction opposite to the target direction, wherein the direction opposite to the target direction may be the back of the mobile platform 100.

As illustrated in FIG. 20 , the recycle rod 232 may be connected to the mobile platform 100 directly, or may be connected to the mobile platform 100 indirectly through the lifting mechanism 250. The recycle rod 232 may be configured to recycle the dirty cleaning liquid absorbed by the water absorbing roller 231. The recycle rod 232 may include a wiper 236.

The wiper 236 may be connected to the mobile platform 100 directly or indirectly. The wiper 236 may interfere with the water absorbing roller 231 to wipe away, through pressure, the dirty cleaning liquid absorbed by the water absorbing roller 231. When the water absorbing roller 231 rotates, the water absorbing roller 231 passes by the wiper 236 from top to bottom.

When the water return mechanism 230 works, the power mechanism 260 may drive the water absorbing roller 231 to move against the target direction (that is, the contact part of the water absorbing roller 231 with the surface to be cleaned moves in a direction opposite to the target direction). In this case, the wiper 236 can be located behind the water absorbing roller 231, and the water absorbing roller 231 absorbs the dirty cleaning liquid on the surface to be cleaned. Then, the water absorbing roller 231 interferes with the wiper 236, and the wiper 236 wipes out, through pressure, the dirty cleaning liquid absorbed by the elastic water absorbing material 235. As described above, the power mechanism 260 can instead drive the water absorbing roller 231 to move in the target direction (that is, the contact part of the water absorbing roller 231 with the surface to be cleaned moves in a direction same as the target direction). In this case, the wiper 236 may be located in front of the water absorbing roller 231, and the water absorbing roller 231 absorbs the dirty cleaning liquid on the surface to be cleaned. Then, due to the rotation of the water absorbing roller 231, the water absorbing roller 231 passes by the wiper 236 from top to bottom, so that the wiper 236 wipes out, through pressure, the dirty cleaning liquid absorbed by the elastic water absorbing material 235.

The recycle rod 232 may further include a recycle groove 237. The recycle groove 237 may be connected to the mobile platform 100 directly, or may be connected to the mobile platform indirectly through the lifting mechanism 250. The recycle groove 237 is connected to the wiper 236, and is located on a side of the wiper 236 away from the water absorbing roller 231. The wiper 236 is connected to the mobile platform 100 indirectly through the recycle groove 237. When the wiper 236 wipes out the dirty cleaning liquid absorbed by the water absorbing roller 231, the dirty cleaning liquid flows into the recycle groove 237.

The recycle rod 232 may further include the dirty water tank 242. The dirty water tank 242 may be directly or indirectly connected to the recycle groove 237, and may be configured to receive the dirty cleaning liquid in the recycle groove 237. The dirty cleaning liquid in the recycle groove 237 may enter the dirty water tank 242.

The recycle groove 237 may include a recycle bin 239. The dirty water tank 242 may be connected to the recycle groove 237 through the recycle bin 239, and the dirty cleaning liquid in the recycle groove 237 may enter the recycle groove 242 through the recycle bin 239.

The recycle rod 232 may further include recycle blades 238. The recycle blades 238 may be disposed in the recycle groove 237. The recycle blades 238 may be pivotally connected to the mobile platform 100 through the recycle groove 237, or may be pivotally connected to the mobile platform 100 through the lifting mechanism 250 and the recycle groove 237. The recycle blades 238 can transport the dirty cleaning liquid in the recycle groove 237 to the recycle bin 239 through rotation. The recycle blades 238 may be a worm blade, a spiral blade, etc.

The recycle rod 232 may further include a recycle drive device, namely, the sewage pump 233. The sewage pump 233 may be connected to the dirty water tank 242, and may be configured to pump the dirty cleaning liquid from the recycle bin 239 to the dirty water tank 242. The sewage pump 233 may be a gear pump, a vane pump, a plunger pump, etc. When the recycle rod 232 works, the sewage pump 233 may supply power to the recycle rod 232. Under the action of the sewage pump 233, the dirty cleaning liquid flows from the recycle bin 239 of the recycle groove 237 to the dirty water tank 242.

The recycle rod 232 may further include a blade drive device, that is, the power mechanism 260. The power mechanism 260 may be connected to the recycle blades 238 directly or indirectly, and may be configured to drive the recycle blades 238 to rotate relative to the mobile platform 100. The power mechanism 260 may be connected to the recycle blades 238 directly, or may be connected to the recycle blades 238 indirectly through the power transmission device 261.

When the water return mechanism 230 works, the power mechanism 260 drives the water absorbing roller 231 to rotate, and the water absorbing roller 231 absorbs the dirty cleaning liquid on the surface to be cleaned. Then, the water absorbing roller 231 passes by the wiper 236 from top to bottom, the wiper 236 wipes out, through pressure, the dirty cleaning liquid absorbed by the elastic water absorbing material 235, and the dirty cleaning liquid flows into the recycle groove 237. The power mechanism 260 drives the recycle blades 238 to rotate, and the dirty cleaning liquid in the recycle groove 237 is transported to the recycle bin 239 through the rotation of the recycle blades 238. Finally, the sewage pump 233 pumps the dirty cleaning liquid from the recycle bin 239 to the dirty water tank 242.

The recycle rod 232 may further include a filter. The filter may be located at the recycle bin 239, connected to the recycle bin, and may be configured to filter impurities in the dirty cleaning liquid. When the sewage pump 233 pumps the dirty cleaning liquid from the recycle groove 239, the dirty cleaning liquid is first filtered by the filter to remove the impurities and then enters the dirty water tank 242.

In the wet cleaning assembly 200, power/flow rate of the clean water pump 221 and the sewage pump 233 can be adjusted. A water absorbing amount of the sewage pump 233 is greater than a water discharging amount of the clean water pump 221, to guarantee that 100% of the dirty cleaning liquid can be recycled, and the efficiency can be ensured even when the recycle pipeline is partially blocked.

Further, the cleaning head 210, the water absorbing roller 231, and the recycle rod 232 are all mounted on the wet cleaning assembly 200 through a press plate 280. The press plate 280 may be disposed at both ends or at only one end of the cleaning head 210, the water absorbing roller 231, and the recycle rod 232. Through the press plate 280, the user can easily detach, clean, and replace the cleaning head 210, the water absorbing roller 231, and the recycle rod 232, which further facilitates later maintenance and repair.

Each of powers of the cleaning head 210, the clean water pump 221, and the sewage pump 233 all can be adjusted automatically and dynamically based on a working environment of the automatic cleaning apparatus. Generally, the user can control the cleaning strength of the cleaning head 210 and water amount of the pumps through the human-computer interaction system 170.

FIG. 16 is a schematic diagram of an overall assembly effect of the wet cleaning assembly 200 in this embodiment.

The wet cleaning assembly includes a power mechanism 260. The power mechanism 260 includes a motor 262 and a power transmission device 261. The motor 262 is connected to the power transmission device 261 during both clockwise rotation and counterclockwise rotation. When the motor 262 rotates clockwise, the power transmission device 261 simultaneously drives at least two of the cleaning head 210, the water supply mechanism 220, and the water return mechanism 230 of the wet cleaning assembly 200 to move synchronously.

The power mechanism 260 simultaneously transmits power of the single motor 262 to the cleaning head 210, the water supply mechanism 220, the water return mechanism 230, the water tank 240, and the lifting mechanism 250 through the power transmission device 261. The energy system 160 supplies power and energy to the power mechanism 260 and the control system 130 controls overall operation. The power transmission device 261 may be a gear drive, a chain drive, a belt drive, a worm gear, or the like.

The power mechanism 260 includes a forward output mode and a reverse output mode. In the forward output mode, the motor 262 in the power mechanism 260 rotates clockwise. In the reverse output mode, the motor 262 in the power mechanism 260 rotates counterclockwise. In the forward output mode of the power mechanism 260, the single motor 262 can simultaneously drive, through the power transmission device 261, at least two of the cleaning head 210, the water supply mechanism 220, and the water return mechanism 230 of the wet cleaning assembly 200 to move synchronously.

For example, as illustrated in FIG. 4 , FIG. 5 , and FIG. 16 , the motor 262 is connected to the cleaning head 210, the water absorbing roller 231, the recycle rod 232, the clean water pump 221, and the sewage pump 233 through the power transmission device 261. When the wet cleaning assembly 200 is started, the motor 262 starts to work and rotates clockwise, and the clean water pump 221 suctions clean water from the clean water tank 241 and sprays the clean water in front of the cleaning head 210 through the water outlet device 223. The cleaning head 210 cleans the surface to be cleaned through reciprocating motion. After being absorbed by the water absorbing roller 231, generated sewage is recycled by the recycle rod 232, and is suctioned from the recycle rod 232 to the dirty water tank through the sewage pump 233. When the motor 262 rotates counterclockwise, the cleaning head 210, the water absorbing roller 231, the recycle rod 232, the clean water pump 221, and the sewage pump 233 do not work, the lifting mechanism 250 starts to work, and the cleaning system 150 lefts the surface to be cleaned.

As illustrated in FIG. 3 , FIG. 4 , FIG. 5 , FIG. 11 , and FIG. 12 , the lifting mechanism 250 is disposed between the mobile platform 100 and the wet cleaning module 200 and is connected to the motor 262. Both ends of the lifting mechanism 250 are fastened to the mobile platform 100 of the automatic cleaning apparatus, and a lower part of the lifting mechanism 250 is mounted on the wet cleaning module 200. The lifting mechanism 250 dynamically adjusts a distance between the wet cleaning assembly 200 and the mobile platform 100 of the automatic cleaning apparatus through a pulley system, a traction rope, or the like.

In this embodiment, the lifting mechanism 250 is connected to the motor 262 through a rack 251. When rotating counterclockwise, the motor 262 drives the rack to move down, and the lifting mechanism 250 drives the wet cleaning assembly 200 to move up. When the motor 262 rotates counterclockwise, the rack 251 is disengaged from the gear of the motor 262 after completing a stroke, and the lifting mechanism 250 drives the wet cleaning assembly 200 back to the working position.

The wet cleaning assembly 200 includes a lifting platform base 270. The lifting platform base 270 is connected to the lifting mechanism 250 and is configured to move up and down relative to the mobile platform 100 under the action of the lifting mechanism 250.

The lifting platform base 270 includes a first connection end 271 and a second connection end 272. The first connection end 271 is disposed adjacent to a front end of the mobile platform 100, and the second connection end 272 is disposed adjacent to a back end of the mobile platform 100. At least one auxiliary wheel 273 is disposed on a lower surface of the lifting platform base 270. The auxiliary wheel 273 is disposed on a side of the lifting platform base 270 adjacent to the second connection end 272. The auxiliary wheel 273 may be configured to assist the lifting platform base 270 to move on the surface to be cleaned.

When the lifting platform base 270 moves downward relative to the mobile platform 100, the auxiliary wheels 273 first come contact with the surface to be cleaned, and can roll on the surface to be cleaned to assist the lifting platform base 270 to move on the surface to be cleaned, thereby preventing dry friction between the lifting platform base 270 and the surface to be cleaned in the movement process of the mobile platform 100. There may be one or more auxiliary wheels 273. FIG. 3 illustrates two auxiliary wheels 273. Certainly, there may be any number of auxiliary wheels 273, such as one or three auxiliary wheels 273.

The auxiliary wheel 273 provides better working space for the cleaning head 210, increases an effective contact area between each cleaning unit of the cleaning head 210 and the surface to be cleaned while ensuring a relatively small friction force when the wet cleaning assembly is in contact with the surface to be cleaned, and reduces the overall power consumption of the automatic cleaning apparatus.

For example, when the user instructs, through the human-computer interaction system 170, the automatic cleaning apparatus to clean through the dry cleaning assembly only, the lifting mechanism 250 shortens the distance between the wet cleaning assembly 200 and the mobile platform 100. In this case, the wet cleaning assembly 200 rises away from the surface to be cleaned. Instead, the distance between the wet cleaning assembly 200 and the surface to be cleaned can be adjusted automatically and dynamically based on a working environment of the automatic cleaning apparatus. For example, the automatic cleaning apparatus can detect physical information of the surface to be cleaned based on the installed sensing system 120. For example, when the sensing system 120 detects that the automatic cleaning apparatus is travelling on a surface of a carpet, the lifting mechanism 250 pulls up the wet cleaning assembly 200 to enable the wet cleaning assembly 200 to left the surface of the carpet, to prevent wetting the carpet, while the cleaning head 210, the clean water pump 221, the sewage pump 233, etc. are all suspended. When the sensing system 120 detects that the automatic cleaning apparatus lefts the surface of the carpet and returns to a ground such as a floor tile or a floor board, the lifting mechanism 250 puts down the wet cleaning assembly 200, and components of the wet cleaning assembly 200 continue to work properly.

As illustrated in FIG. 7 to FIG. 9 , the dry cleaning assembly 151 includes a brushroll, a dust box, a fan, and an air outlet. The brushroll that interferes with the ground to a certain degree sweeps garbage on the ground and brings the garbage to the front of a dust suction port between the brushroll and the dust box, and then the garbage is suctioned into the dust box by a suction gas generated by the fan and passing through the dust box. The dust removal capability of the sweeper can be characterized by dust pickup efficiency (DPU). The DPU is affected by the brushroll structure and material, by wind utilization of an air duct including the dust suction port, the dust box, the fan, the air outlet, and connection components between the four components, and by the type and power of the fan. Therefore, the DPU of the sweeper is a complex system design problem. Compared with an ordinary plug-in vacuum cleaner, improvement of the dust removal capacity is of greater significance for an automatic cleaning apparatus with limited energy. Because the improvement of the dust removal capacity reduces requirement on energy directly and effectively. For example, an original machine that can clean a ground of 80 square meters through one charging can be evolved into a machine that can clean a ground of 180 square meters or more through one charging. In addition, the service life of a battery whose charging cycles is reduced can be increased greatly, so that the frequency of battery replacement by the user is also decreased. More intuitively and importantly, the improvement of the dust removal capability is obvious and important user experience, and the user can directly draw a conclusion on whether the surface to be cleaned is swept or mopped clean. The dry cleaning assembly may further include a side brush 152 with a rotating shaft. The rotating shaft is disposed at an angle relative to the ground for moving debris into a brushroll area of the cleaning system 150. FIG. 7 illustrates a schematic structural diagram of the dust box 157 of the dry cleaning assembly. FIG. 8 illustrates a schematic structural diagram of the fan 156 of the dry cleaning assembly. FIG. 9 illustrates a schematic diagram of an open state of the dust box 157. FIG. 10 illustrates a schematic diagram of an assembled state of the dust box and the fan.

The brushroll that interferes with the ground to a certain degree sweeps the garbage on the ground and brings the garbage to the front of the dust suction port 154 between the brushroll and the dust box 157, and then the garbage is suctioned into the dust box 157 by a suction gas generated by the fan structure 156 and passing through the dust box 157. The garbage is separated by the filter 153 at an inner side of the dust box 157 adjacent to the dust suction port 154. The filter 153 completely separates the dust suction port from the air outlet, and filtered air enters the fan 156 through the air outlet 155.

Typically, the dust suction port 154 of the dust box 157 is located in the front of the machine, the air outlet 155 is located on a side of the dust box 157, and an air suction port of the fan 156 is connected to the air outlet of the dust box.

A front panel of the dust box 157 can be opened for cleaning garbage in the dust box 157.

An end of the filter 153 away from the air outlet is higher than an end of the filter 153 close to the air outlet. An end of the filter 153 adjacent to the front panel is higher than an end of the filter 153 away from the front panel. The filter 153 is detachably connected to a body of the dust box 157, to facilitate detachment and cleaning of the filter.

The cleaning intensity/efficiency of the automatic cleaning apparatus can also be adjusted automatically and dynamically based on a working environment of the automatic cleaning apparatus. For example, the cleaning intensity/efficiency of the automatic cleaning apparatus can be adjusted dynamically according to the physical information of the surface to be cleaned detected by the installed sensing system 120. For example, the sensing system 120 may detect information such as a flatness degree of the surface to be cleaned, material of the surface to be cleaned, and whether there is oil dirt or dust on the surface to be cleaned, and transmit the information to the control system 130 of the automatic cleaning apparatus. Correspondingly, the control system 130 may control the automatic cleaning apparatus to adjust automatically and dynamically the rotational speed of the motor 262 and the transmission ratio of the power transmission device 261 based on a working environment of the automatic cleaning apparatus, thereby adjusting a preset reciprocating period of the reciprocating motion of the cleaning head 210.

For example, when the automatic cleaning apparatus works on a flat ground, the preset reciprocating period may be adjusted automatically and dynamically to be longer, and the water amount of the water pump may be adjusted automatically and dynamically to be smaller. When the automatic cleaning apparatus works on a less flat ground, the preset reciprocating period may be adjusted automatically and dynamically to be shorter, and the water amount of the water pump may be adjusted automatically and dynamically to be larger. This is because the flat ground is easier to clean than the less flat ground. Therefore, cleaning an uneven ground requires faster reciprocating motion of the cleaning head 210 (namely, higher frequency) and a greater water amount.

For another example, when the automatic cleaning apparatus works on a tabletop, the preset reciprocating period may be adjusted automatically and dynamically to be longer, and the water amount of the water pump may be adjusted automatically and dynamically to be smaller. When the automatic cleaning apparatus works on a ground, the preset reciprocating period may be adjusted automatically and dynamically to be shorter, and the water amount of the water pump may be adjusted automatically and dynamically to be larger. This is because there is less dust and oil dirty on the tabletop than the ground, and material forming the tabletop is also easier to clean. Therefore, the tabletop can be cleaned with less reciprocating motions performed by the cleaning head 210 and less water amount provided by the water pump.

The present disclosure provides a water supply mechanism applicable for a wet cleaning assembly of a cleaning device, including a water outlet device, wherein the water outlet device is connected to a cleaning liquid outlet of a water tank, and a cleaning liquid in the water tank flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.

Further, a distributor is provided on the water outlet device, and the distributor is configured to apply the cleaning liquid onto the surface to be cleaned uniformly.

Further, the distributor is a continuous opening or includes a combination of several small disconnected openings.

Further, the distributor is a nozzle, a water dripping hole, or a soaked cloth.

Further, the water outlet device is provided with a connection port, through which the water outlet device is connected to the cleaning liquid outlet of the water tank.

Further, the water supply mechanism further includes a clean water pump communicated with the cleaning liquid outlet of the water tank. In addition, the water supply mechanism may further include a clean water pump pipe. The clean water pump may be directly communicated with the cleaning liquid outlet of the water tank, or may be communicated with the cleaning liquid outlet of the water tank through the clean water pump pipe.

The present disclosure further provides an automatic cleaning apparatus, including a mobile platform and a cleaning system. The cleaning system includes a wet cleaning assembly, and the wet cleaning assembly includes the foregoing water supply mechanism.

Further, the water supply mechanism may be connected to the mobile platform directly, or may be connected to the mobile platform indirectly through a lifting mechanism.

Further, the wet cleaning assembly further includes a water tank, at least one cleaning head, and a water return mechanism, the cleaning head is configured to clean a surface to be cleaned, the water return mechanism is configured to recycle a cleaning liquid that is dirtied on the surface to be cleaned, and the water tank is configured to store the cleaning liquid.

Further, the wet cleaning assembly further includes a power mechanism configured to drive the wet cleaning assembly to move relative to the mobile platform.

The present disclosure provides a water return mechanism, which guarantees a good sewage recycle effect and thorough recycle of sewage. And further, the sewage is separated from sludge when the sewage is recycled, thereby facilitating cleaning the water return mechanism and preventing a sewage recycle pipeline from being blocked. The present disclosure further provides an automatic cleaning apparatus, which changes, by adopting a novel design of a mopping structure, a situation that a typical cleaning robot can perform only dry cleaning or wet cleaning, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect.

The present disclosure provides a water return mechanism. The water return mechanism is applicable to a wet cleaning assembly of an automatic cleaning apparatus, and includes: a water absorbing roller, wherein the water absorbing roller is connected to a mobile platform of the automatic cleaning apparatus and rotates relative to the mobile platform, the water absorbing roller is attached to a surface to be cleaned when the water return mechanism is in operation, and the water absorbing roller is configured to absorb a liquid on the surface to be cleaned; and a wiper, wherein the wiper interfere with the water absorbing roller to wipe away the liquid absorbed by the water absorbing roller.

The present disclosure further provides a water return mechanism. The water return mechanism (230) is applicable to a wet cleaning assembly (200) of an automatic cleaning apparatus, and includes:

a water absorbing roller (231), connected to a mobile platform (100) of the automatic cleaning apparatus and rotating relative to the mobile platform (100), wherein the water absorbing roller (231) is attached to a surface to be cleaned when the water return mechanism (230) is in operation, and the water absorbing roller (231) is configured to absorb a liquid on the surface to be cleaned; and

a wiper (236), configured to interfere with the water absorbing roller (231) to wipe away the liquid absorbed by the water absorbing roller (231).

Further, when the water absorbing roller (231) rotates, the water absorbing roller (231) passes by the wiper (236) from top to bottom.

Further, an outer surface of the water absorbing roller (231) is coated with an elastic water absorbing material (235).

Further, the water return mechanism includes a water absorbing roller drive device. The water absorbing roller drive device can drive the water absorbing roller (231) to rotate in a direction opposite to a travelling direction of the mobile platform (100), and can also drive the water absorbing roller to rotate along the travelling direction of the mobile platform (100).

Further, when the water absorbing roller (231) rotates against the travelling direction of the mobile platform (100), the wiper (236) is located behind the water absorbing roller (231);

or when the water absorbing roller (231) rotates along the travelling direction of the mobile platform (100), the wiper (236) is located in front of the water absorbing roller (231).

Further, the water return mechanism further includes a recycle rod (232), configured to recycle the liquid absorbed by the water absorbing roller (231).

Further, the recycle rod (232) includes a recycle groove (237). The recycle groove (237) is configured to accommodate the liquid wiped by the wiper (236) away from the water absorbing roller (231).

Further, the recycle groove (237) includes a recycle bin (239). A dirty water tank (242) may be connected to the recycle groove (237) through the recycle bin (239), and the liquid in the recycle groove (237) may enter the dirty water tank (242) through the recycle bin (239).

Further, a filter is disposed in the recycle bin (239), and the filter is configured to filter impurities in the liquid.

Further, a recycle blade (238) is disposed in the recycle groove (237), and the liquid in the recycle groove (237) is transported to the recycle bin (239) through rotation of the recycle blade (238).

Further, the automatic cleaning apparatus includes the mobile platform (100) and a cleaning system (150). The cleaning system (150) includes the wet cleaning assembly (200), the wet cleaning assembly (200) includes the above water return mechanism (230), the water return mechanism (230) is configured to recycle a liquid on a surface to be cleaned, and the water return mechanism (230) may be connected to the mobile platform (100) directly, or may be connected to the mobile platform (100) through a lifting mechanism (250).

The present disclosure further provides a power mechanism applicable to a wet cleaning assembly. The power mechanism can drive multiple devices through a single motor, thereby greatly reducing the complexity of the power mechanism and reducing costs while improving the reliability of the power mechanism. The present disclosure further provides an automatic cleaning apparatus, which changes, by adopting a novel design of a mopping structure, a case that a typical cleaning robot can perform dry cleaning or wet cleaning only, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect.

The present disclosure provides a wet cleaning assembly, including a power mechanism. The power mechanism includes a motor and a power transmission device, the motor is connected to the power transmission device during both a clockwise rotation and a counterclockwise rotation, and when the motor rotates clockwise, the power transmission device simultaneously drives at least two of a cleaning head, a water supply mechanism, a water absorbing roller, and a water return mechanism of the wet cleaning assembly synchronously.

Further, when the motor of the power mechanism rotates counterclockwise, the power transmission device drives a lifting mechanism to move.

Further, when the motor of the power mechanism rotates counterclockwise, the lifting mechanism rises away from a surface to be cleaned.

Further, the water return mechanism includes a water absorbing roller and a recycle rod. When the motor rotates clockwise, the power transmission device simultaneously drives at least two of the cleaning head, the water supply mechanism, the water absorbing roller, and the recycle rod of the wet cleaning assembly synchronously.

Further, when the motor rotates clockwise, the power transmission device simultaneously drives the water supply mechanism, the water absorbing roller, and the recycle rod of the wet cleaning assembly synchronously.

According to another aspect, the present disclosure provides an automatic cleaning apparatus, including a mobile platform, a control system, and a cleaning system. The cleaning system includes the wet cleaning assembly mentioned above.

Further, a sensing system is disposed on the automatic cleaning apparatus. The sensing system is configured to detect physical information of a surface to be cleaned.

Further, the physical information includes a flatness degree of the surface to be cleaned, a material of the surface to be cleaned, and whether there is oil dirt or dust on the surface to be cleaned.

Further, the control system adjusts a rotation speed and output power of a motor of a power mechanism based on the physical information of the surface to be cleaned that is detected by the sensing system.

Further, the control system adjusts a transmission ratio of a power transmission device of the power mechanism based on the physical information of the surface to be cleaned that is detected by the sensing system.

The present disclosure further provides a dust box. A filter is disposed in the dust box to completely isolate a dust suction port from an air outlet, so that dust is completely sealed in a dust box, which prevents a secondary spray of the dust and further prevents the dust from gathering in the machine body or from gathering at an entrance. The present disclosure further provides an automatic cleaning apparatus, which changes, by adopting a novel design of a mopping structure, a case that a typical cleaning robot can perform dry cleaning or wet cleaning only, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect.

The present disclosure further provides a dust box. The dust box is applicable to a dry cleaning assembly of an automatic cleaning apparatus, the dust box has a cuboid structure, a dust suction port is disposed on a front side of the dust box, an air outlet is disposed on a lateral side of the dust box, a filter is disposed in the middle of the dust box and configured to divide the dust box into two parts, and the dust suction port and the air outlet are located on either side of the filter, respectively.

Further, a clutch is disposed in the front side of the dust box, and is configured to detach a panel on which the dust suction port is located from the dust box.

Further, a clutch is disposed at a top of the dust box, and is configured to open a top cover of the dust box and then to replace the filter.

Further, the filter is disposed obliquely relative to a bottom surface of the dust box.

Further, an end of the filter away from the air outlet is higher than an end of the filter close to the air outlet.

Further, an end of the filter close to a front panel of the dust box is higher than an end of the filter away from the front panel of the dust box.

Further, the filter is detachably connected to the dust box.

According to another aspect, the present disclosure provides a dry cleaning assembly, including the foregoing dust box.

Further, the dry cleaning assembly includes a brushroll that interferes with a surface to be cleaned to a certain extent. The brushroll sweeps garbage on the surface to be cleaned and brings the garbage to a front of the dust suction port.

Further, the dry cleaning assembly includes a fan. The fan is disposed at the air outlet, the fan can suction gas outside the dust suction port into the dust box, and filtered air enters the fan through the air outlet.

According to another aspect, the present disclosure provides an automatic cleaning apparatus, including a mobile platform and the foregoing dry cleaning assembly and the foregoing wet cleaning assembly. The dry cleaning assembly and the wet cleaning assembly are disposed on a bottom surface of the mobile platform, the dry cleaning assembly includes a dust box, and the dust box is detachably connected to the mobile platform.

The present disclosure has following beneficial effects:

The water supply mechanism according to the present disclosure achieves a relatively large spraying range and uniform spraying, and uniformly distributes the cleaning liquid in front of the cleaning head to wet the cleaning head and the surface to be cleaned, such that stains on the wet surface to be cleaned that has been wetted can be cleaned more easily;

the automatic cleaning apparatus according to the present disclosure changes, by adopting a novel design of a mopping structure, a case that a typical cleaning robot can perform dry cleaning or wet cleaning only, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect and further optimizing a structural design of a cleaning robot on this basis;

the water return mechanism according to the present disclosure fully ensures, by using multiple structures such as a water absorbing structure, a wiping structure, a delivering structure and a pumping structure, that a sewage recycle effect is good, the sewage is recycled thoroughly, and the sewage is separated from sludge when the sewage is recycled, thereby facilitating cleaning of the water return mechanism and preventing a sewage recycle pipeline from being blocked;

the automatic cleaning apparatus according to the present disclosure changes, by adopting a novel design of a mopping structure, a case that a typical cleaning robot can perform dry cleaning or wet cleaning only, and changes, by adopting a mechanical reciprocating mopping structure, a current situation that a typical wet cleaning robot can perform only simple ground cleaning, thereby improving a cleaning effect and further optimizing a structural design of a cleaning robot on this basis;

the power mechanism applicable to the wet cleaning assembly of the present disclosure can drive multiple devices through a single motor, thereby greatly reducing the complexity of the power mechanism and reducing costs while improving the reliability of the power mechanism; or

the filter is disposed in the dust box according to the present disclosure to completely isolate the dust suction port from the air outlet, so that dust is completely sealed in the dust box, which prevents secondary spray of the dust and further prevents the dust from accumulating in a machine body of the automatic cleaning apparatus or gathering at an entrance.

In the description of this specification, descriptions given with reference terms such as “an embodiment”, “some embodiments”, “an example embodiment”, “an example”, “a specific example”, and “some examples” mean that specific features, structures, materials, or characteristics described with reference to the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiment or example. In addition, the described specific features, structures, materials, or characteristics may be combined in a proper manner in any one or more of the embodiments or examples.

Although the embodiments of the present disclosure have been illustrated and described, a person of ordinary skill in the art may understand that various changes, modifications, replacements, and variations may be made to these embodiments without departing from the principles and gist of the present disclosure, and the scope of the present disclosure is defined by the claims and equivalents thereof. 

1. A water supply mechanism for a wet cleaning assembly of a cleaning device, comprising a water outlet device, wherein the water outlet device is connected to a cleaning liquid outlet of a water tank, and a cleaning liquid in the water tank flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.
 2. The water supply mechanism according to claim 1, wherein the water outlet device is provided with a distributor, and the distributor is configured to uniformly apply the cleaning liquid onto the surface to be cleaned.
 3. The water supply mechanism according to claim 2, wherein the distributor comprises at least one of a continuous opening and a combination of several small disconnected openings.
 4. The water supply mechanism according to claim 2, wherein the distributor comprises at least one of a nozzle, a water dripping hole, or a soaked cloth.
 5. The water supply mechanism according to claim 1, wherein the water outlet device is provided with a connection port, and the water outlet device is connected to the cleaning liquid outlet of the water tank through the connection port.
 6. The water supply mechanism according to claim 1, further comprising a clean water pump communicated with the cleaning liquid outlet of the water tank. 7-10. (canceled)
 11. The water supply mechanism according to claim 6, further comprising a clean water pump pipe, wherein the clean water pump is communicated with the cleaning liquid outlet of the water tank through the clean water pump pipe.
 12. The water supply mechanism according to claim 1, wherein the water tank comprises a clean water tank and a dirty water tank independent from each other, and the cleaning liquid outlet of the water tank is a liquid outlet of the clean water tank.
 13. An automatic cleaning apparatus comprising a mobile platform and a wet cleaning assembly, wherein the wet cleaning assembly comprises a water supply mechanism; wherein the water supply mechanism comprises a water outlet device connected to a cleaning liquid outlet of a water tank, and a cleaning liquid flows to the water outlet device through the cleaning liquid outlet of the water tank and is transported to a surface to be cleaned through the water outlet device.
 14. The automatic cleaning apparatus according to claim 13, wherein the water supply mechanism is connected to the mobile platform.
 15. The automatic cleaning apparatus according to claim 14, wherein the water supply mechanism is connected to the mobile platform through a lifting mechanism.
 16. The automatic cleaning apparatus according to claim 13, wherein the wet cleaning assembly further comprises at least one cleaning head, a water return mechanism, the cleaning head is configured to clean the surface to be cleaned, the water return mechanism is configured to collect a dirty cleaning liquid on the surface to be cleaned, and the water tank is configured to store the cleaning liquid.
 17. The automatic cleaning apparatus according to claim 13, wherein the wet cleaning assembly further comprises a power mechanism configured to drive the wet cleaning assembly to move relative to the mobile platform.
 18. The automatic cleaning apparatus according to claim 13, wherein the water outlet device is provided with a distributor, and the distributor is configured to uniformly apply the cleaning liquid onto the surface to be cleaned.
 19. The automatic cleaning apparatus according to claim 18, wherein the distributor comprises at least one of a continuous opening and a combination of several small disconnected openings.
 20. The automatic cleaning apparatus according to claim 18, wherein the distributor comprises at least one of a nozzle, a water dripping hole, and a soaked cloth.
 21. The automatic cleaning apparatus according to claim 13, wherein the water outlet device is defined with a connection port, and the water outlet device is connected to the cleaning liquid outlet of the water tank through the connection port.
 22. The automatic cleaning apparatus according to claim 13, further comprising a clean water pump communicated with the cleaning liquid outlet of the water tank.
 23. The automatic cleaning apparatus according to claim 22, further comprising a clean water pump pipe, wherein the clean water pump is communicated with the cleaning liquid outlet of the water tank through the clean water pump pipe.
 24. The automatic cleaning apparatus according to claim 13, wherein the water tank comprises a clean water tank and a dirty water tank independent from each other, and the cleaning liquid outlet of the water tank is a liquid outlet. 